JPS61276779A - Connecting method for accumulater and aluminum pipe - Google Patents

Abstract

PURPOSE:To prevent the penetration into an Al pipe by inserting a bar into the Al pipe of the connecting part after inserting Al pipe into the connecting port of an Al made accumulator, and pulling out the bar pipe after welding the connecting part and Al pipe. CONSTITUTION:An Al pipe 5 is inserted from one part of the connecting part 1a of Al made accumulater 1 and from the other part of the connecting part 1b the rod 6 (stainless steel rod) of heat resistant and undepositing quality to Al having the outer diameter less than the inner diameter of the Al pipe 5 is inserted into the Al pipe 5. In this state, the welding is performed on the periphery of the end face of the connecting part 1a of the accumulater 1 and the bar 6 is pulled out after welding the connecting part 1a and Al pipe 5. The penetration into the Al pipe 5 is thus eliminated at the welding time and the pressure loss of a refrigerant is reduced because of the regrigerant path being not barred.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of connecting an aluminum accumulator of a heat exchanger and an aluminum pipe.

2. Description of the Related Art A conventional method for connecting accumulator aluminum pipes made of aluminum is shown in FIG.

Insert the aluminum pipe 3 from the connection part 1a of the aluminum accumulator 1, insert half the sleeve 4 into the aluminum pipe a, cover the remaining 9 halves with a separate aluminum pipe 2, and connect the accumulator 1. Welding 7 was performed on the circumference of the end palm of part 1a, and the accumulator 1, aluminum pipe 3, and aluminum pipe 2 were welded together. And aluminum pipe 3
By using this, the sound of bubbles can be prevented when liquid accumulates in the main body of the accumulator 1.

However, in such a connection, when the aluminum pipe 3 is inserted from the connection part 1a of the accumulator 1 and set to the welding jig, the aluminum pipe 3 comes off and enters the inside of the accumulator 1. I often got caught up in it. In order to prevent this, a jig for fixing the aluminum pipe 3 was required, which required a lot of man-hours. Moreover, since the sleeve 4 is inserted to prevent the aluminum pipe 3 from melting into the interior during welding, the pressure loss of the refrigerant passing through the pipe increases. When the pipes 2 and 3 are integrated and welded directly to the accumulator 1, there is a disadvantage that the integrated pipe melts into the interior during welding, increasing the pressure loss of the refrigerant due to the small inner diameter of the pipe. .

The present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a connection method that allows an accumulator and an aluminum pipe to be connected in a simple manner and that can reduce pressure loss of refrigerant.

Means for Solving the Problems In order to solve the above problems, the present invention inserts an aluminum pipe into the connection part of the accumulator, then welds the connection part of the accumulator body and the aluminum pipe, and after this welding. Even if you pull out the stick.

Function: Therefore, by the action of the rod, welding into the pipe during welding is eliminated, a simple connection method is used, the pressure loss of the refrigerant is reduced, and the number of assembly steps is reduced.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1, 2, and 3. Note that the same parts as in the conventional example are given the same reference numerals, and detailed explanation thereof will be omitted.

As shown in FIGS. 1 to 3, an aluminum vibro is inserted from one connection part 1a of the accumulator 1, and a stainless steel rod 6 is inserted from the other connection part 1b of the accumulator 1.
Welding 7 is performed on the circumference of the end face of the connecting portion 1a of the accumulator 1 while the accumulator 1 is inserted. After welding the aluminum vibro and the accumulator 1, the rod 6 is removed.

This prevents it from penetrating into the pipe. Although the rod 6 is made of stainless steel in the above embodiment, it may be made of any material that is heat resistant and does not weld to aluminum.

Effects of the Invention As described above, the present invention inserts an aluminum pipe into the connection part of an aluminum accumulator, and then inserts a heat-resistant and aluminum-free material into the aluminum pipe, which has an outer diameter close to the inner diameter of the aluminum pipe. A welding rod is inserted across the connection part, the connection part and the aluminum pipe are welded in this state, and the rod is then removed, so that the welding into the pipe during welding is prevented by the action of the rod. Furthermore, since the refrigerant passage is not obstructed, the pressure loss of the refrigerant is reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a welding process of an aluminum pipe to an accumulator according to an embodiment of the present invention, showing a state before insertion; Fig. 2 is a front view showing a welding state equivalent to Fig. 1; ! J is a front view showing the completed welding state corresponding to FIG. 1, and FIG. 4 is a partial view of a conventional method of connecting an accumulator and an aluminum pipe. 1... Accumulator, 6... Aluminum pipe, 6... Rod. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
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Claims (1)

[Claims] Insert an aluminum pipe into the connection port of an aluminum accumulator, then insert a rod made of a heat-resistant material that does not weld to aluminum and which has an outside diameter equal to or less than the inside diameter of this aluminum pipe into the connection part. A method for connecting an accumulator and an aluminum pipe, the method comprising welding the connection part and the aluminum pipe in a state where the rod is removed, and then removing the rod.